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The blue dasher (Pachydiplax longipennis) is an insect of the skimmer family. It is the only species in the genus Pachydiplax. It is widely distributed throughout North America and into the Bahamas. [2] Although the species name longipennis means "long wings", their wings are not substantially longer than those of related species.
The body is uniformly metallic blue-green (hence the Latin name caerulea, meaning blue). In the immatures the abdomen is red with black markings. These bugs are useful predators of leaf beetles in the genus Altica, of larvae of various beetles and caterpillars of moths, but it also feeds on plants. Eggs are laid in the spring.
Chrysochus cobaltinus, the cobalt milkweed beetle or blue milkweed beetle, is a member of the diverse family of leaf beetles, Chrysomelidae. It is named after its cobalt-blue exoskeleton, which makes it easy to spot and distinguish, and its tendency to feed off milkweed plants. It occurs in the Western United States and British Columbia. [3]
Eggs are deposited at night, singly or in small groups; one female produces some 100–200 eggs. Eggs are placed on plants, usually where aphids are present nearby in numbers. Each egg is hung on a slender stalk about 1 cm long, usually on the underside of a leaf. Immediately after hatching, the larvae moult, then crawl up the egg stalk to feed.
Blue bottle flies are typically 10–14 mm (3 ⁄ 8 – 9 ⁄ 16 in) long, almost twice the size of a housefly. The head and thorax are dull gray, and the back of the head has long yellow-orange setae. [5] [6] The abdomen is bright metallic blue with black markings. Its body and legs are covered with black bristly hairs.
dog bane beetle (Chrysochus auratus)Chrysochus auratus, more commonly known as the dogbane beetle, is a leaf beetle primarily found in the eastern United States.The beetle is approximately 8 to 11 mm in length, and possesses an oblong and convex shape.
Leaf beetles are partially recognizable by their tarsal formula, which appears to be 4-4-4, but is actually 5-5-5 as the fourth tarsal segment is very small and hidden by the third. [2] As with many taxa, no single character defines the Chrysomelidae; instead, the family is delineated by a set of characters. [ 3 ]
Nymph Male imago of Baetis tricaudatus Baetis sahoensis. Baetis is a genus of mayflies of the family Baetidae, known as the blue-winged olive to anglers.There are at least 150 described species in Baetis.